Programmable high and low temperature alternating test box basic breakdown maintenance method: Programmable low-temperature alternating test chamber test in the course of the daily use of the basic fault, the exclusion method by the Warwick instrument to do some analysis When the programmable high-low temperature alternating test box suddenly fails during the test operation, the control instrument displays a corresponding fault display prompt and a voice alarm. The operator can quickly check which type of fault belongs to in the troubleshooting chapter of the operation of the equipment, and then the professional can quickly eliminate the fault to ensure the normal operation of the test. Other environmental test equipment will have other phenomena in use, it must be specific phenomena, specific analysis and exclusion. The environmental test equipment shall also be regularly maintained. The condenser of the refrigeration system shall be regularly cleaned. For the moving parts, the oil shall be lubricated according to the instructions, and the electrical control system shall be regularly maintained and inspected. These tasks are indispensable. Change the low temperature of the test box can not reach the test index, then you must observe the temperature changes, the temperature drop is very slow, or the temperature rises after the temperature reaches a certain value, the former must check, do before the low temperature test Dry the studio, keep the studio dry, and then put the test sample into the work chamber and do the test again. The test sample in the work chamber is placed too much, so that the air in the work chamber cannot be fully circulated. After eliminating the above reasons, It is necessary to consider whether it is a fault in the refrigeration system. In this case, it is necessary to ask the factory's professionals to perform the repair. The latter phenomenon is caused by the poor use environment of the equipment. The ambient temperature of the equipment and the location (the distance between the cabinet and the wall) must meet the requirements (specified in the equipment operating instructions). In the heat and humidity test, the actual humidity will reach 100% or the actual humidity and the target humidity will be very different. The value is much lower. The former phenomenon may be caused by dry gauze on the wet-bulb sensor. Then check the wet-bulb sensor. Whether the water in the sink is short of water, the water level in the water tank is automatically controlled by a water level controller. Check if the water supply system of the water level controller is normal and whether the water level controller is working properly. Another possibility is that the wet ball gauze may cause the gauze to become hard due to the long use time or the purity of the water supply, so that the gauze cannot absorb moisture and dry, and the above phenomenon can be eliminated only by replacing or cleaning the gauze. The latter phenomenon is mainly because the humidification system is not working. Check the water supply system of the humidification system. Whether there is a certain amount of water in the water supply system. Control whether the water level of the humidifying boiler water level is normal and whether the water level in the humidifying boiler is normal. If all of the above are normal, then check the electrical control system, which requires professional maintenance personnel to inspect the high and low temperature test box in the high temperature test. If the temperature does not reach the test temperature value, the electrical system can be checked and the faults can be eliminated one by one. . If the temperature rises very slowly, it is necessary to look at the air circulation system and see if the adjustment baffle of the air circulation is normally open. Conversely, check whether the motor operation of the air circulation is normal. If the temperature overshoots badly, then you need to set the parameters of the PID. If the temperature rises directly, the overtemperature protection will occur. If the controller fails, replace the control instrument.
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